kitty's titties vs ne plus ultra

kitty's titties

noun
  • Synonym of cat's meow 

ne plus ultra

noun
  • The perfect or most extreme example of its kind; the ultimate. 

  • A prohibition against proceeding further; an insuperable obstacle or limiting condition. 

  • The highest, ultimate point of achievement which can be reached; perfection. 

How often have the words kitty's titties and ne plus ultra occurred in a corpus of books? (source: Google Ngram Viewer )